Lepidoptera (/ Ë l É p Éª Ë d É p t Ér É / lep-i-DOP-tÉr-É) is an order of insects that includes butterflies and moths (both are called lepidopterans). About 180,000 species of the Lepidoptera are described, in 126 families and 46 superfamilies, 10% of the total described species of living organisms.
Skin Tension Lines and how to get it. 1  Skin Tension Lines (STLs) are series of lines based on the direction of tension as this relaxed skin tension lines run perpendicular to the underlying muscles contraction. For best results and aesthetic outcome, place skin incisions along skin tension lines.
The tension force is the force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends. The tension force is directed along the length of the wire and pulls equally on the objects on the opposite ends of the wire.